{
  "manageEntity": {
    "action": "Save",
    "entityId": "760673032",
    "entityType": "Track",
    "nonce": "0x6aaedfcdaf46cafadf2570e88a9d18f693dbd090becea3fc815e5cbd8bbd4ea5",
    "signature": "0xf10e0c4e219b773bd36ef3d6308a4699fc692d6571836018ce5cb2ba8e43a63f1d13adcf849490a2f8a79a90c9195a7395d21ca0f753f0955c3827d5ad27d50a1c",
    "signer": "0x4A3D09CdfD42dE4C57dc67B09a40B5d9172bD69f",
    "userId": "787102835"
  }
}