{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892665109",
    "entityType": "Track",
    "nonce": "0x7d11f121b34549015ffae578d4ca99bc24262a91faf38140a39be69c7304499f",
    "signature": "0x13fc04ce95af47578c342cc237728b8f2e0343cabc78d2081bc618f03f412bf34db88dd69a6541b012a00b01c5b8182c5c1750bb995c2fe324b60a7b4b025c631b",
    "signer": "0x568426a5D555ADe94657d547B2Df4a4dc1f0C014",
    "userId": "71569007"
  }
}