{
  "manageEntity": {
    "action": "Save",
    "entityId": "165290",
    "entityType": "Track",
    "nonce": "0xdfa0871b08f3ae32f931d241e49e1bb4ecbfbcf64ce9d78e7ab2c38a1dced4a1",
    "signature": "0x74d9bdad5db826d10d1d61a1b29a5c3ae2b09977ecaed2ade67fdd86b68f58a96ecd2a6ab4c2b7a593517d05ab7de0b8c320002b9f6d48b4944cdd1c96595b211b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}