{
  "manageEntity": {
    "action": "Save",
    "entityId": "1365691330",
    "entityType": "Track",
    "nonce": "0xa3fa951982b05b6e5d14945f41ca4d81ce584cc6d404ebf8baa6fa24c9e1d695",
    "signature": "0xbce3d56f3a5cb84fa92e1fdc30b900a0b2c1bba6ea478fe73bbf097bafc47c2e61f3eafb21d4b6555042a4b8cc7e5c6557f70fa7b8dec35aa2b1e646990fdc5c1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}