{
  "manageEntity": {
    "action": "Save",
    "entityId": "177296129",
    "entityType": "Track",
    "nonce": "0x8819c57b7c354ce9ee0ac561ad4c6c18bcec4fb5486039bb47b5b2c6979cd8c2",
    "signature": "0x858b64677d73d857a33fe2c57af66a807bb0ae56e3513121b49a7c183336b3c473c9f0f82eecc7f45a7b625c47808df9bdf1ac3d30a1f13d94c7b39c052359131c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}