{
  "manageEntity": {
    "action": "Save",
    "entityId": "1369729857",
    "entityType": "Track",
    "nonce": "0x4f4877868e057193acead1a9ca70501c612c3f709c14fcc9268de73c951079e9",
    "signature": "0x051b7bde982b2b1ff9962125b611e5bc423895f1bf374e6e4a2add0d88e038b01fbdb286323d2f2cb1e79959ff4fb4bc713342cc0880659c98fb8d765944da1e1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}