{
  "manageEntity": {
    "action": "Save",
    "entityId": "1088516398",
    "entityType": "Track",
    "nonce": "0x56b674cb2a3088fe6aaa2ccf78c335f07e4483c246fc30b29c2bb4fdc6e0d7b1",
    "signature": "0x708182df0d93d49b4ee777a9f504adfca196e0174eb1c28382d0eb311a0bd9255415071ac7f1f0d768dd5bd28a0ef50e4adf53454e06520b8887c31cb5090c501c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}