{
  "manageEntity": {
    "action": "Save",
    "entityId": "823393987",
    "entityType": "Track",
    "nonce": "0xb66fc74a45444a4bda9adc2957dffc05683ed41dec54f149f282c40130462ada",
    "signature": "0xd1a70d6aaf048a61ae249f5693f01e0cb23226aa2f9bfa16575a9803083e934d4c2af209b847d7f4b94da79666872e89c8860d35a159101995ba437e9551b0181c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}