{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0xf461c1c0b8e6cc88c3c9cdf62c1f331c828774061819667f028107f28d7a47fb",
    "signature": "0x0eb9f0f43e32e769255938c8ff1686800589ec91c0551101b8659aa803b1a1fb3f3ee65df6bb562d9bb1642415b83b492e036025ed9bd428686b16494ccb28311c",
    "signer": "0x645AAbB3BF848412862B16580BBDb4CEeBBf2EE6",
    "userId": "47150955"
  }
}