{
  "manageEntity": {
    "action": "Save",
    "entityId": "622798256",
    "entityType": "Track",
    "nonce": "0x793b1605fb773691654dbf219a0fd23eb7d963b689ac69a0e927cfa7f3d0f204",
    "signature": "0x8c131fc302774326f870c0cdd23347e863b821437ba257193e9944102a3357ad17c74c8ee7d1d8342fd0eb8a5bfdda6374497b8ac2c9da95c64e53450bccddf81c",
    "signer": "0x9881bA04eA95d8a4De5594aBC9DBd5c96F38eF34",
    "userId": "211307"
  }
}