{
  "manageEntity": {
    "action": "Save",
    "entityId": "1267458499",
    "entityType": "Track",
    "nonce": "0x5dfe574a13988b5b70e7cdb46da62fcedc3848d325e3f98916b945f1ed58eb5d",
    "signature": "0xc03fe3f527c90827b55148ce02a4f88339ed82922391231c1248f2d840c2b4c508e7ab79cc8c158fa4f59702986f1d19b700e3d48f522bf6072eceded521daa81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}