{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "749613261",
    "entityType": "User",
    "nonce": "0x2ad64159a544e49d24b35106698c5d2f0803107bda6fb0edb63d2124d5be3073",
    "signature": "0x52b0393479c50897d9f5c44e8af53451cbbf91a74eb55ce4f82dc2cca79f988c14a50eb01bade66afe644909742097831767bada86c15ed3685fddf49cc007bb1c",
    "signer": "0x3c30507939bFBf87FAC58ff7512A140BdE48C0Cb",
    "userId": "216427183"
  }
}