{
  "manageEntity": {
    "action": "Save",
    "entityId": "886621240",
    "entityType": "Track",
    "nonce": "0x47dc2f96f5fa4520873102862d42402b39ffc25fb532d54c24caf4c5cacb8883",
    "signature": "0x8264ed16971f7c50c37e164191e41848065340ce9bf2f5d54d33134dacd440520d3015875daa58370f7fcaa85e9749c75faff34140393995d68045127835c8461b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}