{
  "manageEntity": {
    "action": "Save",
    "entityId": "48433635",
    "entityType": "Track",
    "nonce": "0x6ef959b092d41f7901625286d125b4b894a076a43e5eb3f864edf6872691ce1f",
    "signature": "0xd35e889e6c366dba7bc1ea40fcc1cc100cb66c968bd1d92c806edd3f3d51015d38dc6dea68b02f7b1b5e3f902915dfe82c1abb5587ce658eb34a5a7bdcc6c8441c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}