{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855176186",
    "entityType": "Track",
    "nonce": "0x464e345521004619c14090db4646164a0e8a6e0482b473a299c4721751f1c4fc",
    "signature": "0xf103e129a2d04992606bf5e087516b5b0cabb1d748d9339cde8ceb0aedbdd0362d2947817837c086e7f0993a11b0cd0f478422111e04c42fe87572ac5be6916c1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}