{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf5bd78a5516e3a90d7229f8dec4e397aa0a01d4ee5d230afcbf31bd9b59d3daf",
    "signature": "0x77c83d78ab058883357cdd7be346e910f6f47be438b097a34e222348890a3e8d48f5369ab5a96b975825ee06bfe109f39e0b1893f35651f232e564df8a11f0da1c",
    "signer": "0x02e15765C61eDed8E41cC3ECE6C97dEE0F691c98",
    "userId": "729344507"
  }
}