{
  "manageEntity": {
    "action": "Save",
    "entityId": "636171608",
    "entityType": "Track",
    "nonce": "0x89174d22174cd4199cfca04b25401c6106ebf7a054748d4e9d368ec4f0c6a7c3",
    "signature": "0x48475057cf335dcb99262c33b0097f5774ee9f497320e24eb42e7857ebab1878431e7cf164af060c3d5aeb326efac72321520da789db51bd5f11a96ce20873351c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}