{
  "manageEntity": {
    "action": "Save",
    "entityId": "199008",
    "entityType": "Track",
    "nonce": "0x797aa61d25c93de8486b6943b7254d39b242b1ec064c2bd6f45e1f2adfe2ad25",
    "signature": "0xfa2f700771a3bd3c083073bc1f771b1a4a12b17648356420dc79cbbf5c9cb659490c0cb05955b8fdf741b9a86a73737d3a00a87e6eeb231e852399653ee0dd841b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}