{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177587161",
    "entityType": "Track",
    "nonce": "0xd494e8ab23d696a3d6d8a2eaa63cd6907b426f4bbcabcdfdda061e94f80e9369",
    "signature": "0x93f4ce9dd38ef76bbd1bda4eaceab71df1d34688ed82e12ccae20292d953b0b61ed9c2536872f181cae5a3ebecbec12edc76587b9bef89625b8c154cbc6864821b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}