{
  "manageEntity": {
    "action": "Save",
    "entityId": "664240519",
    "entityType": "Track",
    "nonce": "0x32ee31b16be7f35fd55639478381c7d66f6fc87dc1b38286434859490cb0ae7f",
    "signature": "0x5372ec930eb49a09b729d6ca0874e6e66b5dbab4176bb99903e275dbdc7364894216fde6cf25e6dca1ad5f1219599b690ef3d8ea66afd439dddbdde6589188d31c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}