{
  "manageEntity": {
    "action": "Save",
    "entityId": "849534081",
    "entityType": "Track",
    "nonce": "0x992bd02789ece7bdde5a4de2a7f6afbcc26027ef954f2cc448408d063e191225",
    "signature": "0xc0dcd1c004a51660c86ee6029c1ec5f9969445bffc6ba21ce66b02c22c0bb9a04d38dea9cc8cbb35a28df5d9ad992ae0bf15faf9b9a8da2b0108c10ae80034f71c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}