{
  "manageEntity": {
    "action": "Save",
    "entityId": "377833095",
    "entityType": "Track",
    "nonce": "0xce2af9b17691300afab0b63358719ff7472e7a0ec9cf2e903367c598af67cee9",
    "signature": "0x263b8d44924fdc638a3103bd20d69c4d1002264b35626d33b253dbc925a427f3432fce6ba020edca3c98ca3f0b3dc8f46c20949a561459728ceefa9b75a3b2911b",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}