{
  "manageEntity": {
    "action": "Save",
    "entityId": "1455978009",
    "entityType": "Track",
    "nonce": "0xc0958af5280fa901d511e2bea0f2e652ddee761cbd862991ec86512505e7ebf5",
    "signature": "0xcf509e398e6c393289a745288a5aa507b2177e922f602feb2fba31cc9c7cb99f796d5df22d798933d329b2cc759a275d372917ac26948d235157f405cf2f25ed1c",
    "signer": "0x6802Fe39C5FA9f99ac1Aa32F164982185A3E70ea",
    "userId": "152482938"
  }
}