{
  "manageEntity": {
    "action": "Save",
    "entityId": "541321",
    "entityType": "Track",
    "nonce": "0xff270d092c6756871cbd663729584401c49e3baad578551a9e5c2bf49b38a3fa",
    "signature": "0x8531a5fd5c4dafe94cbcbf85e894e14d1e5fe185491f2aa6e2b3f265b57aec1b4ddf0ffda54fdda999db3341711f585ccbae990aa1fdf966c7174b8fd628f2ed1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}