{
  "manageEntity": {
    "action": "Save",
    "entityId": "1535159205",
    "entityType": "Track",
    "nonce": "0x836169344d00046f03bb66cbc7c9ce6ffbb438a8f279db93f7e7c8e9622c31da",
    "signature": "0x6fa64f5656c42280b3af5f1916d32ee1a1006376514dfd556414f807da1243c944443c319b39be88c4fa68573f098f6ea96272a1389a2da34a5fbe4ff3aafe461b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}