{
  "manageEntity": {
    "action": "Save",
    "entityId": "1402295474",
    "entityType": "Track",
    "nonce": "0x119595706df0f21c4d7c305379f46b508d3a86bc548b6cef167f48ba0c2aa863",
    "signature": "0x72f4075491efcbcccb6e3f69935cc507ed0211471e81f2b088a636525654e0026d880eac946a4c43f1baa2ae646517159354570e3b2488f26b755100da0c22401b",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}