{
  "manageEntity": {
    "action": "Save",
    "entityId": "566059595",
    "entityType": "Track",
    "nonce": "0x2fa4283e645e0c0a46a3cb22667dcd99f7734bf6d1f0b778b5af4a51d6ecd3ca",
    "signature": "0xb32aba2acea1dd7a8abcd7a490a10d02a9c70ee4b8d6abe50a40fc5e572cb36c04e418ffdb6bd9092b041c1fb96f4c22be51ffe948d62847a467011af9f7c81e1b",
    "signer": "0x1A748d74Db6424f9EA1Ce41A3A445631765103bc",
    "userId": "799948905"
  }
}