{
  "manageEntity": {
    "action": "Save",
    "entityId": "320822",
    "entityType": "Track",
    "nonce": "0x2f091e1428db519ab728c0e3758424934250d2fd0b36511fdf1c6bb33734c709",
    "signature": "0x2d0daf81cca379eb0e7dbb1968125de9846dd09ac932e0011aec6465ac45724d2b538ef78ad58371ec11c63eefa100bdc76b268149d2fdcdfebdbf226fbc07421c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}