{
  "manageEntity": {
    "action": "Save",
    "entityId": "553111",
    "entityType": "Track",
    "nonce": "0x8e57fb96d00f4f44aa6841e793f7f9925aae1ed0ecb1d7414cb9b62c872d50de",
    "signature": "0x77beedceabc1c5fa121538ecee1f51a0193b400bfe5c3b13227ca4f7705b7ae77cb826b585e37235e6cd1d94edea1faf8c40cd953d8384f063a9c85ce6d905851c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}