{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120599",
    "entityType": "Track",
    "nonce": "0x6883992fec342676744bc6da00ef4b932ba847ac1528d4609b9b172e8bb3bba2",
    "signature": "0xc38e9e1d36a99afc36e88fb33d5a5472c6bdb64fc3a6f084b7cadff50984db1f7f6b1ac51ec7798e330a8a350390675d03284ea5f3b186bec80814f3be28538a1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}