{
  "manageEntity": {
    "action": "Save",
    "entityId": "1148847381",
    "entityType": "Track",
    "nonce": "0xd9dd8fadff561d546b497e06cf6a7be1533542c84149bf272ddc205bebc15d7d",
    "signature": "0xa5a3e03870ea8659b627db690cd4eece68f7dacc9c5b6a93090d700338a179ab001c00307d1c9a2965d367f52e1eabcfad500a5d6bbc94b6d8e4d10412f864af1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}