{
  "manageEntity": {
    "action": "Save",
    "entityId": "950153274",
    "entityType": "Track",
    "nonce": "0x0067fefac236fc9c7a77750e396789490cd6bfbb6aeedda5d5fe7687fea568d2",
    "signature": "0x2a9ccce4298d5ca589dfedaf6002703975d7fa679f9ed3af5276aac234c94a9f45c234049fd366dbacbfe04de090a2d50a6bf553dc1d19c352295949ce2e3a891c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}