{
  "manageEntity": {
    "action": "Save",
    "entityId": "1105909880",
    "entityType": "Track",
    "nonce": "0x4b71fd837592c43b9a11e19a10955a08bfbbe25720d388a250b6beebeb5a1840",
    "signature": "0xa79ff316928e0d5c7035b32543e6071912d6540b860a422631bf2a00c5cb056506c3f850a1b7d30f27a3390eeaf3f8d29928a48c5d6d3ce6f1f89472730be8071b",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}