{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098349710",
    "entityType": "Track",
    "nonce": "0x859be3149f31ef381fe1745a2da8fdd00a45f1c7022cfbee83a50ca67d89279e",
    "signature": "0x19b881db1fa000bba44ade369db0b72f06515d3087d39a789f42bb9e608c9f0e04f6d24adaf809caee8c83d6b75782d72fd2cb789e86f7a24f6c30690bae2d361c",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}