{
  "manageEntity": {
    "action": "Save",
    "entityId": "1409378559",
    "entityType": "Track",
    "nonce": "0x59bb2a1c84a669f7c6cd561470dfa2177430687b031c5b19d87c9361063af80c",
    "signature": "0x6020fe51e73758021ba69849190b29d291b894ea620bb2d3bffc512d621f85746aee94100d5d0c6ab9ce4b4461720d5499bb26df94abcb2f22fdb704c6ceeecf1b",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}