{
  "manageEntity": {
    "action": "Save",
    "entityId": "1127611",
    "entityType": "Track",
    "nonce": "0x26d67e23d40ffab92008155a0501590bbcd8204d5a0f599417364426fb0725c4",
    "signature": "0x26fa9fb3b43622c905763726418441452f8ff06748db41461ef52d21318f3aca32b63aaf4506ed56305d24938d0876482737c76832e8c6de76335a9fe8f0cc9e1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}