{
  "manageEntity": {
    "action": "Save",
    "entityId": "334484",
    "entityType": "Track",
    "nonce": "0x2267c5e26ff52487dc35b7f809156b06286775ab6850b8f6703af4b2e5e20d37",
    "signature": "0xd0e1910580eaab460741a2755d10ea3c935c8d588482d38524f5c9271412f7083854b2a6a885f31e72028b13b7ca6732e8fdd67c3f248cb485e12760de13bd4c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}