{
  "manageEntity": {
    "action": "Save",
    "entityId": "1706904312",
    "entityType": "Track",
    "nonce": "0x7d8c271dcf0db378d97a1506f5bde1e64f89869d8be376e302d2daf79bfb401f",
    "signature": "0xd3208e53fab348fac7c94465debc7ce7476ea4ae48a8eeb76e886931b0e0b918545b594e5a26a06d8ce76435ca8bc7100f5873379b76bfbb6eb625ce716673cc1b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}