{
  "manageEntity": {
    "action": "Save",
    "entityId": "1439416591",
    "entityType": "Track",
    "nonce": "0x95324d16f5fde8cbf2baded380edfc8fd916f6d7d04866886df7b81e534f50c6",
    "signature": "0x8f7e0faf6d9c5bbfe556d12f98018eb11b8c0327112c926d5b2be3947a4d4e9b4fd45138ea68f1c387ee63216450fd94ba908961ff2903a7f2f698af88d3bec01b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}