{
  "manageEntity": {
    "action": "Save",
    "entityId": "57560289",
    "entityType": "Track",
    "nonce": "0x24ee28dc2db48e1bfcd3b9c5b0a0fa62a21c2ee09d5d9b85cb6cb556d409cf26",
    "signature": "0x86fd17b5d16e38477dc799f3f3b523822255bf5bca0e9b8c7a77d0ed496a40c86739a557a0377a25b71a6b5028baceeef417929f61e4cf7cf825e1f36be562231c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}