{
  "manageEntity": {
    "action": "Save",
    "entityId": "696749136",
    "entityType": "Track",
    "nonce": "0x1541a5d1f968e83db76766ea82d6d5aaf8fe108948f692a2a863629989b9a9b1",
    "signature": "0x76bf83de44358524f6647d5dd59a98f5540ebf1765dde4b57148660d64c33b91347121521a32f84367971e101b212e54ee55dd01f9e1ecb86fbd9f4bc1de26081b",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}