{
  "manageEntity": {
    "action": "Save",
    "entityId": "1917611770",
    "entityType": "Track",
    "nonce": "1792384402282337044",
    "signature": "0xb3a88b9e0b56bf6628873612d5ac75b0211e7fdc28e9d0a5e6bff07a35fcf5f912d1d0ca5222f8554eac33ad6f8fff108fcf9cd2187ff8be80b2aa592af06a0b1b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}