{
  "manageEntity": {
    "action": "Save",
    "entityId": "1891007119",
    "entityType": "Track",
    "nonce": "0xbc5cf1d7b25b2b71ed391ea2633d735d642d6c53c0b38e9e9bd0668bef955f71",
    "signature": "0x3253928271ae3ca89173822fb1f6232613fc89f24061875d69f7507621cb696075db19b973c1224191a3cabdd03802321609f889b78134d335d022441b3efddc1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}