{
  "manageEntity": {
    "action": "Save",
    "entityId": "1437165418",
    "entityType": "Track",
    "nonce": "0x0ad030a6d9cd4f90966d2d719a14eb3eb34b970dee7514e6c29dcf841fba5d52",
    "signature": "0xd7db1fbc2f122c085d7ca84283ef07a25a990cdb32ee8f5e6dcdb2cec158f7fc6835ea380f611f812b6dc3c0977d5c1ffda2df8a89355edf45352e272681d7831b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}