{
  "manageEntity": {
    "action": "Save",
    "entityId": "154162",
    "entityType": "Track",
    "nonce": "0xbe651781b53966d771a12a907398f49dcffc7fc8cc5174133180a9db47684425",
    "signature": "0xeebff898d84911d9a552c5b3885a364a26db5b91e7cf0f4d5108d1f10e569d9b1cee108aeb312afa59abc875bdcaf22910addae9858d1f1b80425f798fb62baa1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}