{
  "manageEntity": {
    "action": "Save",
    "entityId": "1306259878",
    "entityType": "Track",
    "nonce": "0x3b2c23c06a13ef1217c610214ae09ceee345036f74b0198fd02d39a621fc7400",
    "signature": "0x7bada334be209f779fca8b4d3df6d50d5b67eb073b9eb3b58b47189b6852f1146ea3c3b3571cd87ae338e98b1713d13de05bc63664ef0919922c4a98d3fa547a1b",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}