{
  "manageEntity": {
    "action": "Save",
    "entityId": "698069210",
    "entityType": "Track",
    "nonce": "0xac83a44e4db1f8dcbb1a1404ded9ce5e6b1f7939ea7b939e2d1be0ce53705e2d",
    "signature": "0x425fafeb6a401db789061e15624e7e2a71f77b177ad527884996a0a079e2c66249e9f1a8ea6b5232142feded5515415a2bcdd3c3638ba0bcfec0fb1ad4c65e631c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}