{
  "manageEntity": {
    "action": "Save",
    "entityId": "934321734",
    "entityType": "Track",
    "nonce": "0x42d4164fdd2059d1819c46aa46fe751a7547c487a8c6948bf5d829457586f222",
    "signature": "0xad1ef2e0e3fa87407380c39c85cb34f0585c903dd4d4c7453cf0e7427a7d451b617a4fdc56db9416261b8f98b76f11a5d13178f37e7d5189a15dbe39e1388a651c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}