{
  "manageEntity": {
    "action": "Save",
    "entityId": "471171689",
    "entityType": "Track",
    "nonce": "0x4bb11d4faf763cd6132fd52f391c03f36a734483b3f37b314cd22220dad04035",
    "signature": "0x87a5dc9c24e9e72e1f5eecc9a10d845718509116a1728f1da2f1471c3d55730819c7c83b54058333c5f644e17c9fcf9248098b663770a9b5841ac52978be885b1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}