{
  "manageEntity": {
    "action": "Save",
    "entityId": "951661526",
    "entityType": "Track",
    "nonce": "0x270b909e8e939183cb677dbfe532a32dba724f47276a1ba07f7ae7f10755f20c",
    "signature": "0xb615281a0d9c76760fd76a47819acfce468316ab3c6eb415a27e930fd71a9e1b52ca59045b8f85d8f566d15ce4ac3bbe6522f61c8b30e3a449d9ff70c09bd8a11b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}