{
  "manageEntity": {
    "action": "Save",
    "entityId": "958952",
    "entityType": "Track",
    "nonce": "1781180716671916282",
    "signature": "0x5bd13c22080774c390f0dd2fd4882ee41df6688a25b3d8dd4bde74dcffd373a7743010f9689e3aa67ac4ea660f42351818f74c4f6ccc6e6dc1b59fd76292ea2c1c",
    "signer": "0x2cc593FC814461263d282A84286Fd4F72c79562e",
    "userId": "175201368"
  }
}