{
  "manageEntity": {
    "action": "Save",
    "entityId": "784208",
    "entityType": "Track",
    "nonce": "0x0d5a34682047ae17ebb08225825b48b2c7466c342a832e9fbc297b622fea3929",
    "signature": "0x5b06041b8107960f77b4fc75cd6cd767ee4f5a12fe194690e3d2b4d67b10f2996abc0ac670dbd2f8d9682d06428a9bc8b0ad4f0e645422f0e015e7d2ceac95611c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}