{
  "manageEntity": {
    "action": "Save",
    "entityId": "385702",
    "entityType": "Track",
    "nonce": "0x69893e0804fc04778756b1c3b6b38df3abc4ee1916b3e26a071907797fa4eb19",
    "signature": "0xc5e6543dd71eee73ac8cae03ba029f91be42f693c3f33364e0a6204bcc58a9ee3c69ee1763006af028dbcbfe1e441688011aee0cd11af6b99baf453bd757829e1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}