{
  "manageEntity": {
    "action": "Save",
    "entityId": "1607764907",
    "entityType": "Track",
    "nonce": "0xfb12c1c205d5e2154a988e60882390c0e17c38a6b6b7d286e4ffacfeb8186dc5",
    "signature": "0x3aebb30b02598eb5cdbc69656a7fa1da0ae361f36e69df15c6102b9a0013604a076717454333ba4f395467ce60b5d04a55e64f6dd696fcc322f99954c12de2131b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}