{
  "manageEntity": {
    "action": "Save",
    "entityId": "362129067",
    "entityType": "Track",
    "nonce": "0x3a149fc96bdb82e53c1a7f7866822c6dd663766d1dfad471fa4e16b9fd1a6bd9",
    "signature": "0xa9d8f0649fc4ad906ba7c360382e3092c6e407048dacf0b0960b4f7448beb1b97beb4a590e29430e4942f065700e689f369f442a10a7d577689cbbac92d21cc41c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}