{
  "manageEntity": {
    "action": "Save",
    "entityId": "915896",
    "entityType": "Track",
    "nonce": "0xdf5649f21f5706cd50d71404702f744e2cd1270e01e208e128d6a282d14fe11f",
    "signature": "0x8127f25b4cab13e1d68a8c6a090edc664cc147f3c94c412b024906c8ed18111979ef00a726362c9c57fe1443e052d494880b41592e72668f72d19a8c778a47d41c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}