{
  "manageEntity": {
    "action": "Save",
    "entityId": "201059164",
    "entityType": "Track",
    "nonce": "0x441ac95f83e355880f0f5e9c0b7a1b0f88b7ef75b605b1bd581e3a9f6a89157d",
    "signature": "0x5b33b4dc209377b9ae29930905da5bae29c9b3c647e79daf5bfd16a85a34923a488b19a133acdf6930a550a670661460331f468d7832fce4d7762bae55a177591c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}