{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "743881",
    "entityType": "User",
    "nonce": "0x1972a81ac7205a1827ffc514337a005bd76fe942476da13fc5ecaf02c4497f1d",
    "signature": "0x221c06cf35447c30496fa6e73e590596d0479d8f55840ff69a035008da5af5852e4b6e8fe2b2a55df5c74b9c3d2fb47713cb915bfda8876d774ff19228b3e4d91b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}