{
  "manageEntity": {
    "action": "Save",
    "entityId": "50509",
    "entityType": "Track",
    "nonce": "0xdc03a6c61e48f2d6b45d0a11c0bfa1d31e205ef6fe41e90a11c4f4cb85376cba",
    "signature": "0xaf816c70d2c9ae6e3ee1f2f4dabc8a78549603a72c438f6f717da1593fb504971ead353ca0609248d06d5ec79638ed66700b08cf31ede5e811cf685103308ef81c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}