{
  "manageEntity": {
    "action": "Save",
    "entityId": "1427015225",
    "entityType": "Track",
    "nonce": "0xec5cbb77a97a6335c62e9606700bae323d82a95f44d583ab17ded6f86c1b937d",
    "signature": "0xd43be25062d734a7acbe34688d6e1a459978dcc5afbec53503b688e5d8c0b74b7c3fdc9aa419c18a565ec08a25500f543389918d060ea0657d82c63c3a16eb6a1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}