{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255207723",
    "entityType": "Track",
    "nonce": "0x88c19b9e2126c16edace76c56055bfea767f8891f991ecd077ad613d744c5ad1",
    "signature": "0x4dcd151cddc9c7e61272a7c381211620625d01ab862580fdcdb31ea3ea185bab3950c3fdb6b95a30c1093064556ae06a3c8450ce83f0814019439907aa778d041c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}