{
  "manageEntity": {
    "action": "Save",
    "entityId": "1146006245",
    "entityType": "Track",
    "nonce": "0x6100d3a6ddd37c80cdb636591ba11dab7706cf321e6b1c6bb2479b1664ad02d8",
    "signature": "0xf00d20d1fa93c5e3fe3ee57501229c1fc22a821369dd16972b585dd0ec9b2a9d00e4988c79e84fa7b9a6b9b1fde007a65f4aa7bb81be4ae90a62dcb77685c2521c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}