{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa55f054976c4e96c240408f1a8779494adce17aa76fc238cab978356d4944078",
    "signature": "0x6e501053200f892f02c3f8102ed985032ef5643243f0799318d9cac43ec4bcd303afc1ef702d18ec6af5bde7c04dae3b9e42167a1a90ef02389deac58006c72e1b",
    "signer": "0xf90a555b82071B20579CF4613CEE87e65D866f9b",
    "userId": "39495480"
  }
}