{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0x9215e4ca3993dc3d0f9152d5c7cb561969585d903103ce54a08084d5883fd76f",
    "signature": "0x1ba9e765b1759e16943ddaed1a82d1d241a79a74299c33b50cfae2116f6146675a2082347011ebe91b59357316e375ae80e0748642e73242b0f342b0c4fa04b61b",
    "signer": "0xfC070d9d02c152146e3D1B2cD4B03FD7a3CA1AB0",
    "userId": "539537193"
  }
}