{
  "manageEntity": {
    "action": "Save",
    "entityId": "811428",
    "entityType": "Track",
    "nonce": "0x1ae1f72d8af82017158e1f2867e846d6481a2717010cd0f3e6c8d27daa9df04d",
    "signature": "0xbb2293ecbb0c3f3ae9956736e6237a9f1c20c447bd756f1bd3c4674fe468139c3559818f3d34ee1bf41429bcc9bdaac7fc70a91219f82c98126ff4f3889641291b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}