{
  "manageEntity": {
    "action": "Save",
    "entityId": "380744094",
    "entityType": "Track",
    "nonce": "0x1ffcdcb840349933bd5c6998bec901d06cc5d1bd162fdfe73844139a42675f71",
    "signature": "0xc6598a7f31a046bae22f8cf3903a8954915beae24ea973f20fc452da6dbf4049364c5d166271867496671cf00a68ba2295c357afe5921e454242c3cbedc2cb191c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}