{
  "manageEntity": {
    "action": "Save",
    "entityId": "769733294",
    "entityType": "Track",
    "nonce": "0xe706a7ab50b6b5d3f37e888c7121f2f8e2062f12f9ba8a4382d4f6501d6c1d3c",
    "signature": "0xaa2079a6a039f3693fbbb481d557cd9055e82601dd05b034b0e920c2bde3b5891cdf40894ff4e8288a78aaec39bb0b79bf2148862b3ee55fb841287a86d0df1d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}