{
  "manageEntity": {
    "action": "Save",
    "entityId": "2014673734",
    "entityType": "Track",
    "nonce": "0xd4f2065e8ca588f73a947b6c8085e9d0f37ae5b987427ecd37959ffcea535ab3",
    "signature": "0xddd40d2b2e24de4c7f32e7201a92613c86a8b7d457cb0cfa047fb9885db31da42c775f88b695e49e1f42406b2281e02a2221de4d7ea660996d01d7fa91dc8f021c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}