{
  "manageEntity": {
    "action": "Save",
    "entityId": "1413812508",
    "entityType": "Track",
    "nonce": "0x39d50c37b0f7fcc6330790f6c5ef09ae22f12ccb96561cdb4df54c985a659c07",
    "signature": "0x0d1365d5fb9da41d336c391aa616fcab160988099defce3b31bf20e35da37ae6663d97bcad937ac739d8394d3b52c2c0e204d94d52600cebfef4d182e8335f6b1b",
    "signer": "0xBD46d315142217685c7fE4aC6359DFfe663E7a4D",
    "userId": "409129"
  }
}