{
  "manageEntity": {
    "action": "Save",
    "entityId": "374268061",
    "entityType": "Track",
    "nonce": "0x3752ae473512bd24ca2d830b74795e49b2836d9a85afeeb5e3ef6700dc020dd8",
    "signature": "0x40727b11a7ef961def20c3c0bd21ecb91ee9131a64a65848eda40cb77be4f4465722c61a0dcdfa639a7e470b1cb44298213ff41e2ace7df7ebae8ee398da67241b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}