{
  "manageEntity": {
    "action": "Save",
    "entityId": "1791801235",
    "entityType": "Track",
    "nonce": "0x01458eded95c11819ab2fb79c0fddf11ddd704337c5f2cb86b1078d9f590d2f3",
    "signature": "0x6953d3a1e22e1ec39743d2d899aaab162bfd1660bdf39b6c49c93734d1779cbb0ccfe372061e6fee67e7516622fae4aa4717b8c9847cd14a4ccdb54d1e35995a1c",
    "signer": "0xC1896EAF7ae2431A08647A163291b5a8A0cd2a6C",
    "userId": "185209372"
  }
}