{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "665",
    "entityType": "User",
    "nonce": "0x3a0182cacee3061acb8bf13c46fff3efc83434e824b3fe1e624648f4ac1532c0",
    "signature": "0x9ce53808127a3ab9c4bdd3709d08677b653d8a1928c6dd770e044a5202a6be9c7a31b0d3ca3fc48e4f133be272b911c47863322c42b903bb3cc6687539c60cde1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}