{
  "manageEntity": {
    "action": "Save",
    "entityId": "404077",
    "entityType": "Track",
    "nonce": "0x4249907e22ba92fd18db7a0490411617c33d4f0164600d79525dd228315d5823",
    "signature": "0xab0f8c1c2794ae0514d3d9b728d173aa5f64d14883354de2e44c6b8f85a1f07245381c9da8a70bc5707a5180b37c240608ce896a3223559497eb555468c0e3801c",
    "signer": "0x38bB298DBEbdb95aDB71E0b6d265CFBd2341DccD",
    "userId": "120501"
  }
}