{
  "manageEntity": {
    "action": "Save",
    "entityId": "331283829",
    "entityType": "Track",
    "nonce": "0xa0a3154cb1eccfa6fa3132681efd88b8dd6e2909bed519fc575f11d0c29782a6",
    "signature": "0x321ae4917d0179b0958a16bee2549719126899b8b2ec2dca61837d34da94bf3b158585482a51a06276d5356c8d9fb30b670bc879424a380240fda6075fbacb081c",
    "signer": "0x195d9eE11400245E841C02c4b4288a90A8195e91",
    "userId": "103785872"
  }
}