{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089951321",
    "entityType": "Track",
    "nonce": "1786589228358968550",
    "signature": "0x9e46563e98895b0dd3427e8b15fad4885436d3d4ece4cc068b4c088ad376c64372f3a2c08f86df7eb29f591ad2065f00df12dd70bc435b41b6cf512f087d78d11b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}