{
  "manageEntity": {
    "action": "Save",
    "entityId": "831736614",
    "entityType": "Track",
    "nonce": "0x19f10bbe7cde6e84158cae1b02bbcb0a49c339674205d3dd87550c3e68220b92",
    "signature": "0x409c439f6eddc7e06bc62890fb3e3c9e1acf01490a437c0b5f85423b091a6a0757835d9dc9e49d92832196ca8f9a24ecdaef154bb86303f20ee1103cf98c3af51b",
    "signer": "0x45C74e4f36E4e5064C5321eeED3748fD52B04eA8",
    "userId": "133970929"
  }
}