{
  "manageEntity": {
    "action": "Save",
    "entityId": "1534388031",
    "entityType": "Track",
    "nonce": "0x16230f47ea3de8b877a9fa621cde31fe49d38e1f70928720eee3a1a0097c4323",
    "signature": "0x782bd8b10c9317accbef94421a3c3739a87053990bfcd6d3533f7ad6643c16c535ec84d657978522e017e0008e081638703d3c237a50a66eaee317a70deb4f481b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}