{
  "manageEntity": {
    "action": "Save",
    "entityId": "658031991",
    "entityType": "Track",
    "nonce": "0xabd7e8128976e55812bbb9278707a57678c2ac6c3ad9fbe568da219e51fe2fc7",
    "signature": "0x3a30a566c706dcc2d7bcee15c8847998725c572a8954d229bcc1e1be75b9d812025d9751c3154186f23e5753963a6d4ef0804c1d4051b3c85078dbb1e2401f1a1c",
    "signer": "0xB2A34b43465721B690e6CbCfB42C0cdC30050183",
    "userId": "103086"
  }
}