{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309038121",
    "entityType": "Track",
    "nonce": "0x289cca1c58178a0357735626f43b6cfc425b4feb785160221aaaf1d8a6759a8f",
    "signature": "0x6b704f29301e7b893f9a8ce4fc146a133b82c085ce46c241ba1b2ab97d08709b71a4108ce9d9ec3a2b05e7bbd8b2ca7914da872c364800f578bf19375cd4524c1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}