{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931374379",
    "entityType": "Track",
    "nonce": "0xc0909a308e7c6cd64efb992c4a08a50285aec2ba1f7012172acc8ad409556172",
    "signature": "0xc4fa047b6121b245b3eae3e1e7d380240bddf0911e8c19674b299109e6a208d766b5d91f16e9284adf24ab8b8189d425157d85593a0eeea20cf24c7b5ef85b571b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}