{
  "manageEntity": {
    "action": "Save",
    "entityId": "116856186",
    "entityType": "Track",
    "nonce": "0x7b435d920ac13b1e4d5a78b46113622bb471c9009e43a4d3618b28130a72a74c",
    "signature": "0xa0ed64cb86d3b9a27e42f7b71a31a215ee9bb0ed8f491bc50403e48bea3c8cb25dec6d86ba78fa6ef32800d6aa4c47598e97070825174102054afdf787750f511c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}