{
  "manageEntity": {
    "action": "Save",
    "entityId": "930253648",
    "entityType": "Track",
    "nonce": "0xf8046116f3fe7b923ed5c64a6db51d4c9e4fddf991b381a7d57f09d66956b2e7",
    "signature": "0xbc019c7fb7919cb50504c139c59699689b705c0aef85f818a9838d1adcddea1c5448c80ca81414dbc5ef27122fadb2b7a59c838bb13fc76215f07b74a5ef265f1c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}