{
  "manageEntity": {
    "action": "Save",
    "entityId": "1511370223",
    "entityType": "Track",
    "nonce": "0x18f012f412c65cddea7d7153d5878c6ed9e79d4d1d832396207d7de627538ad6",
    "signature": "0x7b733b72120d9c2b0242f8309f912655ea520369f7dc0011f11546db853596047ad675973cc49804313fbe4e8ba5bdbe3d10262245a64cdb89c1568be962b9741c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}