{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "789943876",
    "entityType": "User",
    "nonce": "0x740cf7e215e3fde9a5f8011a6d739b5c4730971b720f4664e68f8447a431293e",
    "signature": "0xe78fc7bee75a3f109f4c2a4f4527794899061b8680d7e159653ae7c2058bd8261de7daaf999dd42021aacff7e81b8e5045484b117dedb550b548dc501cbf55f71b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}