{
  "manageEntity": {
    "action": "Save",
    "entityId": "816302",
    "entityType": "Track",
    "nonce": "0xd3d2bf61a6cc5eb511f47c4abf4fd797f4da99f29ba4596d38bf2f167ad33446",
    "signature": "0x9ff0c80f593c16f38d64e28e40d5dc21f1f16da9c02e3f3499c2f51e53c8f99b424eb807826b4cf99ddd82e785b5459fd812cfc2d54f7981824af98967e351301c",
    "signer": "0x6673fDca0C0Ccf6295F7256018c42dc92F62Aa66",
    "userId": "708882563"
  }
}