{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x767d4b0cb621b51d5246a962938620e2fcb2b2eae17d382ef6500a6e0d0ea148",
    "signature": "0xa59b0275ee8218ae0fa5207d40de142461206efee53c68302b2f2b17f19c278f7c79d5376dcebc39906e4015d433e8aefe5eadf641642aff67df3c980f374a9c1c",
    "signer": "0x08738da5C57ffe911B02Cc9ccA65A56d50c38F55",
    "userId": "421075373"
  }
}