{
  "manageEntity": {
    "action": "Save",
    "entityId": "1087639457",
    "entityType": "Track",
    "nonce": "0x7c554a6289ece41fd5ab4c190c471ea64bab02e1c013a8cb587cd04d25433b05",
    "signature": "0x8af8ed41591e223d32a787ca2c72d28f63b0fae80c3e7d1993619766bf907fef2d79c6c717819099b92f44984ffc526609193e0a6b609be929bcd8958e3dbd271c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}