{
  "manageEntity": {
    "action": "Save",
    "entityId": "1398460602",
    "entityType": "Track",
    "nonce": "0x364efb92b85dfb53442b5337a3d3ab32fa73919b85db1009fe96c01ad5fcd8ec",
    "signature": "0xf532ac31240904e0c8b81f8bb7d2b4f3ed89a97a8eb74bd0a5044ff40ba58cca1de327fecbd3631e4fae45d5421b2a2faaf168f43c19fafb6d93e2b4e349b0e51c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}