{
  "manageEntity": {
    "action": "Save",
    "entityId": "1023999289",
    "entityType": "Track",
    "nonce": "0x2fad08bb5893883b470c9c09f64c1bed1b5125b3b2e035c74ee209ee0d8540b6",
    "signature": "0x6b666df16f9ee5ec8db521d5eaac70ae8bea9b8af5638e23460ad49f222ee0e14dbfd0a6760f60700136c874e54b0b121ec322f24ed8c96a6bca0e049da6e2d71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}