{
  "manageEntity": {
    "action": "Save",
    "entityId": "2032581613",
    "entityType": "Track",
    "nonce": "0x783e050a009d54fb54327f6e78e96267a1b5adc0ad4cbc389338b27c4b41ed7b",
    "signature": "0x4dbea8d4b9d4aaf746e4bf9cccf0b467fbfcf912bbb07f153b55710c99a0e1e03d8e89ae3ef2c9d7c71ca7166fdf9ba99d0337467a537b2b8cf25e756fb8416b1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}