{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699093258",
    "entityType": "Track",
    "nonce": "0x2bed343cd7e89bc69876788136c936d43f91ca78dc58279b77b555043c6872fd",
    "signature": "0xcd0708bfec6433ce3a733fcf6d903b47f5fe4557c43220d8a5fd5e00fed6f719038634a5511eab85d15dc4af5a488ec4b233c1b8c7131bdba1ca89e3307263141c",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}