{
  "manageEntity": {
    "action": "Save",
    "entityId": "891876911",
    "entityType": "Track",
    "nonce": "0x8aa69e5021d28b5757eb0fcdf932f9a2389693fbfa389d391f5be19033259dc1",
    "signature": "0xb12671b8fc820d540bee6db82809d4afddfa27fa575539553cf6919a73387d09198b7dffc46e0624c2bc46ff0341f7cce682c46268e90f2c089720530a3edb401b",
    "signer": "0xdBe895810b3F9F6Dc6073E427C17bF8C3e1DF6A5",
    "userId": "842575483"
  }
}