{
  "manageEntity": {
    "action": "Save",
    "entityId": "407139",
    "entityType": "Track",
    "nonce": "0xa050235f29fa25e58d7e23bd07e4438bf3095d1d37efe931b4478fce4f119520",
    "signature": "0x24f082a71a472d98d653fdb33ed0aba3aa321c1dd5954677dbba47c3cd0cccbb5f7b83acc9183dc0acb9986c104be0cb6676afad3f7edde07ac00b08a2841bba1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}