{
  "manageEntity": {
    "action": "Save",
    "entityId": "1766245814",
    "entityType": "Track",
    "nonce": "0xe5fd70cb1c5d1159c23eff6ab815c5f0e31433ff8b93f248dcdcfc2df5c6befb",
    "signature": "0x185d61879ae2282e9b100a0b3af8b681db1f6598951945775843d7fc7c6d433e479bc06e21dd804f997621b74dab409087ccf26fbc1f3c3ea568b119444434f31b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}