{
  "manageEntity": {
    "action": "Save",
    "entityId": "1724964047",
    "entityType": "Track",
    "nonce": "0xdf5d8f8569722dd3cd4a6772fccc25e09fb389559c7894e082b600e65affc7de",
    "signature": "0x2262c8049466d47697afa86eac530c7ce6b1d0cb9fa52d666e0543444ea568be18eaea4ceb606959b0a149493c1b79465089b63560277c7334ed3efe9b80e8d21b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}