{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1425373",
    "entityType": "User",
    "nonce": "0xa1ab7d25ff532e978fe08524dc7f92b3ef35496ede223234d0dc73d46ba1aed9",
    "signature": "0x98cc0a463041e8397e0e2f1ab147c7e8ced7a9bfa5dcc0657acc0a0561c67b7f1c1fd5ab88507cabce00d6234d3142354d794f8f8754081df1a6088aeebfa5f41b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}