{
  "manageEntity": {
    "action": "Save",
    "entityId": "1822764224",
    "entityType": "Track",
    "nonce": "1784259834821057931",
    "signature": "0x8788cf9396d9c228650e4a9ce87ae1ce863577360c8d923e111a9f5831cd121961a97ee26dbff9c5b45649355ef6e802e3517d8aefb0786d54053d62c0870e581c",
    "signer": "0x028b0571B497d65Faf19Aef806A797F17A18e19B",
    "userId": "143127"
  }
}