{
  "manageEntity": {
    "action": "Save",
    "entityId": "164904024",
    "entityType": "Track",
    "nonce": "0x6571e1027ee5672f59dacf1c02ee0f77076ecc2b32e64b0700c926f6e106d93c",
    "signature": "0x5bf9542da44b1a341f57a5abc248b88d67a4a362acc5dfe832424b928d087618303d1352fcf3e1549160955580672d2a154b8516bc4d3e53c77c8f71d51697ea1c",
    "signer": "0xf40D844F18ceEb158472fa074B5706946f2bb643",
    "userId": "1721"
  }
}