{
  "manageEntity": {
    "action": "Save",
    "entityId": "1366295103",
    "entityType": "Track",
    "nonce": "0x701554a185d467bf4369f6ccbf3dc32d8c7c02f78e586183d0d23342397f7e39",
    "signature": "0x42163a6e013e3a7b44902001418b0f56bf1c9a813ea073f26e5f3baf940c4b204f07b7c71d5b531d82c43b6c640020a9394aa3163df70fafad6045868d0a30651c",
    "signer": "0x6B239e9B75f27b519de7Bad3a26a0b7d30e32D3f",
    "userId": "311257477"
  }
}