{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "449107",
    "entityType": "User",
    "nonce": "0x2ae9382350aee556f70f3b98d3e9ff07b268355540de051b7c5128a899255c98",
    "signature": "0x7a4c2ad4b508606d13761c3c951e9107283c642d937492e188b265f5e56449a93c2c7b328b6896d5c6220b1aa4a3069e5b321606371e22bfcb463be9e92f857e1c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}