{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544420610",
    "entityType": "Track",
    "nonce": "0x0f9c2c90d94d9a7577d6b0ccac15ba22c89a0429353c5971d2b3a9194170b817",
    "signature": "0xb7f3b9524a3aba879d2f9d0f48774cac4bbda005a4172f74ee640423a945256f11d5a2cfbd7f4a25f0d1f7cd4909261ea3e4263aea9a8a55ddec28fb172afdba1c",
    "signer": "0xc00163EC4A1f48C70D0b676b7F5c071142de6C02",
    "userId": "227991193"
  }
}