{
  "manageEntity": {
    "action": "Save",
    "entityId": "932354711",
    "entityType": "Track",
    "nonce": "0x252f00be2343f207e9ba7bf9bbd5b1b5d46570fdc05e98e9ab7fbdbaa1f0c32e",
    "signature": "0xc94949f6a04ca55cac1f04d878eea8bc7e400c4a58ac9c830e670eb1029779d561d94f594780bda9ee769d4b73d1b30b2e2cee6cab5916e46720fc91d4e100f31c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}