{
  "manageEntity": {
    "action": "Save",
    "entityId": "1802542101",
    "entityType": "Track",
    "nonce": "0x6ebf00d06d4c31952e667f76f9f7056f3ddbc556903f56cfa188af4a7d16edf2",
    "signature": "0x7e7ca6286be862b57f05d24ee105ce1659e9d10d2c429fac9d9efa7986f1fa71785a5551079e004147614ac71e61599ae0667695cc5043368143288a3467df021c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}