{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150313704",
    "entityType": "Track",
    "nonce": "0xcf7fea12de2ee7018f69b6cacb7d01f7c7e2db5782178dda94cf15c3666a7b3f",
    "signature": "0x44709df647b852e4684378d95ae469b56cae9c22c6b27ce7c4830e317077d03f17bdd5386898de270bcd02246f22766e01eb43a0602e3408ee32fae5bf34f7561c",
    "signer": "0xb51B50C9b7d88C66d31539161F4BA9Dd72a17dF5",
    "userId": "465531556"
  }
}