{
  "manageEntity": {
    "action": "Save",
    "entityId": "270774644",
    "entityType": "Track",
    "nonce": "0x18cf25d05fb1dbc96693cfeaa67d2169538d9430b66b6cc4c0ad4d584e9efe31",
    "signature": "0x89d64c05ddc2b656781b3bfffd5d77dd82771ee3c7de8db5358ba22a31dc7b9f4e95f492113154e589c7657e3683670aa3faeb863fda3426b34da35aabc204731c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}