{
  "manageEntity": {
    "action": "Save",
    "entityId": "1657707176",
    "entityType": "Track",
    "nonce": "0xc0a8f293eb3f9edeacf074bb9c1deefcb95bae96af447e390ff7710be7b54782",
    "signature": "0x5819391d3c1d07b2324fc7529ec9a407b078f56927d711ddb7d959cbd44488e72dcf7799d7230c4b1de275d0457eb60a8e90e6b00b40088f8b24e1c300550ad81b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}