{
  "manageEntity": {
    "action": "Save",
    "entityId": "527147",
    "entityType": "Track",
    "nonce": "0xdd503322862692973e0f0c2c85e32576b94dc3e8f8476c22041ea6a36fa4467c",
    "signature": "0xa24e3e3cafaf490f258b0b033caec9d1826d7cac1c89b816b805b998bd394d7329b4d6f4bc6f2432adeffd82ce17440cd90a3ef028b288a2f7c2524a7fa333091b",
    "signer": "0x849b8180f084363b37768C823c174C9786020A66",
    "userId": "817339612"
  }
}