{
  "manageEntity": {
    "action": "Save",
    "entityId": "1085886302",
    "entityType": "Track",
    "nonce": "0x52264a53087a619b7a9db3140baa29bea343adcc2a6b369abd127482fd847601",
    "signature": "0x81a1b1b86822ae82735d622e69ac2a0e05b9c180ee41a825019b8fcf6347867056d3ff1b532bda03d46e6d66d05d23101542fb3dc03dc81a37355c6e4b2acaea1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}