{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "667809204",
    "entityType": "User",
    "nonce": "0x72b0aff7801b5a11807c043f62ae479f3a56b78799e628c22e716a3f6729dd43",
    "signature": "0xb9bb138f970dcb01feaf843f5708dbee6f390ab71d856c415a075f170407142f26505f264770eb9cf19f1f5fc4adcba0286021b6ca2d83150cafd1febe10a4491b",
    "signer": "0xE4c0c73a0c0CD7f65f1bE942f8127c8753aB89D9",
    "userId": "857284925"
  }
}