{
  "manageEntity": {
    "action": "Save",
    "entityId": "135865",
    "entityType": "Track",
    "nonce": "0xdeddab0c3d8eee6798f68f5ffa024a74df7bfa7713ae630db8efe0506b9f63fa",
    "signature": "0x3429e73c9faaa6b74468a94535dfcf6d45a906a08aa3d3a15327cd23a828e9be298cc77fe3c448bcf944c933100aa15ef61d544fe4bc3ee0d84756ac1aa3fae81c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}