{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12",
    "entityType": "User",
    "nonce": "0x19d3b1c25683e8c387a7e5e795e74e3bbd2bad6607977f05b1a555f35dc73dcb",
    "signature": "0x83988df7da44cdd594f5c0b927441df597e6922a30c6ac3ae64e6673aa1e48684d6b9f2f7859f3ebb19dd396224232d9b0b71b3408ac6a11fcb1cd90f8f9af3b1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}