{
  "manageEntity": {
    "action": "Save",
    "entityId": "1118871888",
    "entityType": "Track",
    "nonce": "0x17542cb8f98b7856ded435a7f31e3e55d81e54db9ba889991f405611def07806",
    "signature": "0x09aaa5fbb7a7f951e3404de9abbd7b05452d084c03240168255f62e73f1a0a753a263b3ff859ce3be2295ce1aebc7a1fdfa8e1146e77cd965b17684d89e43de41b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}