{
  "manageEntity": {
    "action": "Save",
    "entityId": "491849028",
    "entityType": "Track",
    "nonce": "0x36168aef2c90aa4ef181fe26368a665397c4660acdde8da5399e792fccd590b4",
    "signature": "0x0752e1d94c053a33f8406d68af336f181e46e82d17b73d8d23a340e5924620f522ccec8ca6e14233fedbc0651c152726ce68e16a8fdfd85890b7ed8a02173d401b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}