{
  "manageEntity": {
    "action": "Save",
    "entityId": "81237",
    "entityType": "Track",
    "nonce": "0x1b52651022a63de6c025b4d1816c1add35277b4f2471b743e1e0d9c754174859",
    "signature": "0xb59bb4c640650efba4f9eacf64ad3f6387613c323c305f82433d9a4f301fbdb17c92ab02795f1a8722ec280041ed07b6ab5ac713dc234d530652e0661cc858d21c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}