{
  "manageEntity": {
    "action": "Save",
    "entityId": "1151844191",
    "entityType": "Track",
    "nonce": "0xfc66acd5964edf6d607281ebbbfef762f67d38aa171407cd5012d7707881f8b0",
    "signature": "0xfd2eec172c9e032975dc83579950ac84b4d46170acc4f658216e73bce5cbc70e4916e56bafc8e27fb76a57ef0151358b665bcfc293bf13ab627e7a44127785641c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}