{
  "manageEntity": {
    "action": "Save",
    "entityId": "209725047",
    "entityType": "Track",
    "nonce": "0xd8ed9a060ed99f2c323177d976ccd655d4f9d9aa3046bcf7c861348dc4645d78",
    "signature": "0xabe0c153663d89b69d338009e0af06aac2ce694a3f99a2098ee46b6e0db7ec38094f23d43a1c4468e94eeac7b5915a6ee54c79232b317219d0f3125ac28d3bd81c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}