{
  "manageEntity": {
    "action": "Save",
    "entityId": "563479274",
    "entityType": "Track",
    "nonce": "0x66e73f0effa987d4ae3fc37c778de50f6b48aea0eb4c1653bf102d3e7eb33a10",
    "signature": "0x5709fc30ec0fa2cfb03d9fb385417a22518d95d94c8556760fc538c90b6ed73b559979d8b5f3298de01a923240c0e0a5a164c7334cb4a70556ef4df7fa46f7b81c",
    "signer": "0x568426a5D555ADe94657d547B2Df4a4dc1f0C014",
    "userId": "71569007"
  }
}