{
  "manageEntity": {
    "action": "Save",
    "entityId": "1212637354",
    "entityType": "Track",
    "nonce": "0x1683c0b7e1921a7d3f2be30e4a6909e71840625ce69197a40aab68a677d52d0c",
    "signature": "0x47ad31a194921aa2316e07433a62849fcbb6d340d7f8005150ba9b4e0654ccbe59ab2ed91a939cebaa83d725dc052c607df782a1c151ccf69740d66963312cd51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}