{
  "manageEntity": {
    "action": "Save",
    "entityId": "714149770",
    "entityType": "Track",
    "nonce": "0x342eec71a3639cb925476f24864678796d08d5fae1cbf165d3508c4004b3d8f7",
    "signature": "0x189c7c749da6c66de39b9dd71a8064c0b4a2f90b84cff5b159d864b03855837f310787ac22ea052a0bc508afbefadce246ce07c6dc8a505872dc5241f4d15b651b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}