{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121974",
    "entityType": "Track",
    "nonce": "0xcb6adc057bfa9d34d2ef0ef884c3506feaf9a967ec49be81dec6fe1f5b4c0951",
    "signature": "0x06ff11ac0d3e630736096a6843160af0ff54078c469e7ec517adc3759aaa0b4f3fd57c92e3113b348250b9dd2812b0aec05fe3ef2dfee67af08f3f90d57085641b",
    "signer": "0xCC89cD92c6e13cFe8FaD7993190B2DD0899Fbb58",
    "userId": "780759970"
  }
}