{
  "manageEntity": {
    "action": "Save",
    "entityId": "74214224",
    "entityType": "Track",
    "nonce": "0x73f25efc23afdb6e687cc86aaed9ddf1f0e874ecc73d3ca2086ea3524882b828",
    "signature": "0x6cb78856aa78dc9c8b34464f7f8b06a27e67ba5b99e0cb8c6a436c4f178da8a40522886710c5c7882ad6820435d4f1417260fad9a041a05d527826df04ac72f31b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}