{
  "manageEntity": {
    "action": "Save",
    "entityId": "480516979",
    "entityType": "Track",
    "nonce": "0xfd04b46a0df9c1c2c7be66c6d19b24568d20b60048827e6e1c873334574ad89a",
    "signature": "0x6468fca82f89339a07bd471495be512e0e50758316f90638321df51d170ff42f30bebdb45e4e7acd997a72d2be1a4fa86d821103ae4873f051d7f8e6d422c2101b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}