{
  "manageEntity": {
    "action": "Save",
    "entityId": "854344690",
    "entityType": "Track",
    "nonce": "0x3c5f7c5cd91b27fdc527b6dcf19fcdd8aa42c734c57496a7af3b131a51633de6",
    "signature": "0x8324d18464f4092d5b59988a7df8c086322ea459be568c92e1bcae53fe6767225309435497471ab03f81ce0e8a97e7edb25c7fc04b9483b781042bd747d7cb371c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}