{
  "manageEntity": {
    "action": "Save",
    "entityId": "747375115",
    "entityType": "Track",
    "nonce": "0x3b82300a8f4b49c8d6731120b3c59c3b2f6f94bba0bb9a30d5f9ce243e400511",
    "signature": "0xaa14394851c5170263370c49321779e308435fc0bd92f6559d6416043fdda7f910ceae61104c79260d4c46021ca4ee9e84dbe5a4481b677a0e13412b4c0dbd451b",
    "signer": "0x0D6Fe979092018A5781aE6E1aB0095528543901c",
    "userId": "32331669"
  }
}