{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930133747",
    "entityType": "Track",
    "nonce": "0x03766be462e322ef3ac31ae790b0f6d35ccafc01c9636288ccf61eabcca49de8",
    "signature": "0xedcc0bd3cdd9451e0ecf3fb8612e04d7a27ce64521ee37ef87a3262fcb4ea3dd670136eca48d8a77f2af0f38c8505d067209666f6ff49287e50fe6b10a3a39661b",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}