{
  "manageEntity": {
    "action": "Save",
    "entityId": "1556058432",
    "entityType": "Track",
    "nonce": "0x29129099b65ab94593a073360c9056e78adb9f8ead6b2f79450bfc9b3d1e08ef",
    "signature": "0xce5b63220cfbaee16c5ab9f74fba2620d59fdd5e46ce34c1b557b12c9d6f1f3802f79dc89aba3121f5339b38ba67355b9d9c874b5d0106820001510e3c5af87c1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}