{
  "manageEntity": {
    "action": "Save",
    "entityId": "18106",
    "entityType": "Track",
    "nonce": "0x6a2d56ae31e62e824aa653fda7ff79cfc0e5b1974e70dd0affc85f60c30380af",
    "signature": "0x8fd6b62c58ada998333b4320ff2776a7c8d3aabb97bcefadbf8f093385ffff1f5f10abdf8a873ca8911edb264417bbc4d01e9bf5f03409304d021e411d837fee1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}