{
  "manageEntity": {
    "action": "Save",
    "entityId": "1786634839",
    "entityType": "Track",
    "nonce": "0x327ff67a7a53fe9eb11866d30ad31ba88fe2d4bc311b108bd23fd626a1359d02",
    "signature": "0x198603331678987d1e3ed32b01422aedc1fbe692ffc08ab5a731fd191b04b65f2551821fa24cedc9784aadde7b6fa57fa3ddc83586bf40a280b3d57b672c0c561b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}