{
  "manageEntity": {
    "action": "Save",
    "entityId": "674482612",
    "entityType": "Track",
    "nonce": "0x0c7f374df43ac64c64bbc0ae22d6a055959cf92bb89c9a7a76e0ec58c9343ca0",
    "signature": "0x1af75cd8c2a43c91b501d0fd081ef9a8db86ede4b6d2a4e4b5e964e33b7f8d5134ee3cd01712c7e49ef15033a36d1051b4675913b6c5f6c79f6cd88938e9ed3b1b",
    "signer": "0xa22176a11BF6703EFe39D488aA7cC06aa781C44A",
    "userId": "633924738"
  }
}