{
  "manageEntity": {
    "action": "Save",
    "entityId": "1024228",
    "entityType": "Track",
    "nonce": "0xe7091e73b58bd959620b7294137b112c1d2dbe87f7ca426da7b24387e70cad9a",
    "signature": "0x1878dff6e0b03cc54d442fee9bdfbf330824de299347924ee67968410205002b2c6924c16c16538c5e28db1cb4b959862579d175084f66f79d45989e5fc23fa31c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}