{
  "manageEntity": {
    "action": "Save",
    "entityId": "817075278",
    "entityType": "Track",
    "nonce": "0x01eb1d39a70df99b898cd061278efc722398eccd123d3c1572cbd8d47e9c72f0",
    "signature": "0xb8473c59d6bdd5cd53688ddbe97c657aa473a4f5613a9fa8747042c63ccaae7318d8f4b02fe6e22154db2de51056f68002d27f9dc4c46fe6e21b183104a91fbd1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}