{
  "manageEntity": {
    "action": "Save",
    "entityId": "914857539",
    "entityType": "Track",
    "nonce": "0x18cabf8fac32492300e7f965e8d339449ebaa9cafd3200d1f82aae097483e4e4",
    "signature": "0xe79f1d4ceabe5de254f2a3b5700aab1f6e99aa50736dae4f91bb40ac56572c3568ca445fd7145b5998c362a40c2bae9be902cd50449d09f155e60012cd896d6d1c",
    "signer": "0xF886D10824DDa867eb89ACd60EAF44D01F1B0E8f",
    "userId": "381084983"
  }
}