{
  "manageEntity": {
    "action": "Save",
    "entityId": "1288562498",
    "entityType": "Track",
    "nonce": "0xe93724c19535850ced2e965ef4510793a9df013eb543ace1c9f34adbd1112f26",
    "signature": "0x1642eb611e1159bc88210303a5ae2eacfac107b368f85a5c2cc78b0d8a537a3746573793ca9f47fee76f96b4ea56505e91bf8557c291d0909111ec90b505e5691c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}