{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341890063",
    "entityType": "Track",
    "nonce": "0x789105119066d2ce46e761a484a5c2be6ea6829e3243b3bfd12220de39b7fadb",
    "signature": "0xb611115c1299432ccf75c0c074bf740e93c3a4a1655cc95791fcb52e7d2aa0fb58b019dc0be04c9c307918db7290cd8243594c12bfd30fa69b6e91eeb27a4b161b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}