{
  "manageEntity": {
    "action": "Save",
    "entityId": "130608",
    "entityType": "Track",
    "nonce": "0xf5f0a0ce2ba8b18c529e5dbe9866e30f911cf396fa00568e9759ab1ba882e683",
    "signature": "0x947887116e5f3e1b59ad8ef286bdabf7ccd573b0fcf4aa71709c49f78e02952d0e21326598157ccb6583525ed478a7a99e8d07f5c558d51a8dddd8dd23a49ce31b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}