{
  "manageEntity": {
    "action": "Save",
    "entityId": "864384272",
    "entityType": "Track",
    "nonce": "0x7baced2fff8b34a44a6d5dd1ace633733882deabcfb40b578471c37c266920d5",
    "signature": "0x03b691dedf1259300e17be3c66ff706abfa84566aa50f86af79fba392426d1dc3cfce98102fb8ceaa4fa642e41501c50018931b03338839784f09e7fba4b0c5b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}