{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "155903",
    "entityType": "User",
    "nonce": "0x270c613cb7821d341b776ce3237eea41fcc79f4bd47c34564e01a8f1a05e65ea",
    "signature": "0xe36b0e00adf5b7c379affa6a333181c9a3db1834771b65bbddc375c76548693209da1b204488d050c0269efb5d3c68d404a8fcaac3971734733b5a6f5cc1dc381c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}