{
  "manageEntity": {
    "action": "Save",
    "entityId": "12091",
    "entityType": "Track",
    "nonce": "0x2ef2388a60aeb5e37086511a647c87ac0fe0956e2176a84b73d6e3160ac11fcf",
    "signature": "0x07a473adc907cbefd28c032463845e4146ca619eb70d079d49e5f5a838d687e05d74eb3c2133f55717787a5fcb055101bd22eb54f7fd711e2d79dccf532fc0861c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}