{
  "manageEntity": {
    "action": "Save",
    "entityId": "531033",
    "entityType": "Track",
    "nonce": "0x8fad277138d433c78053577d634c24e05739addf70435f72ca43aa6dc7da57b5",
    "signature": "0xadd32f928c39a31a75dbe5c57f8773bc7c2304e2ac6dd6f010c1ba882b68a3a36315591b42483f57ec43c5f96d8248c455bbdb2dfb544f7e863137252a88293e1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}