{
  "manageEntity": {
    "action": "Save",
    "entityId": "605852033",
    "entityType": "Track",
    "nonce": "0x27e6df17ed575bb8646bb415ed1b0fa8d61f61d829a66cae86d04919a5c4ceba",
    "signature": "0x7df4408e97522a828f24d760b713ec3865873e2aff18a23adf500c239affaafe081bdc7b5a3dbf9a5613a6189f2ac22346dcce6332d651f99d74dbb98e6b44641b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}