{
  "manageEntity": {
    "action": "Save",
    "entityId": "619643",
    "entityType": "Track",
    "nonce": "0x8032e49dda87cfe1a34c51b27c2b9f37cb2db1bb1042594f7adc0ae18add0ed0",
    "signature": "0xc07117c0e8addce6cdf1c0aa0dc66d45386f2a40868c9e28825dea34841debe62ea0b0f20d94deb416314adc34c25aa1001a070196adec4c2a561273ea5943721b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}