{
  "manageEntity": {
    "action": "Save",
    "entityId": "1667225260",
    "entityType": "Track",
    "nonce": "0x7ff76c8f4ef90b6d9f379e99e5aa26455f088590a76c2b046cee045d7c4530bb",
    "signature": "0x2f7aea454e28233c75fc4d2e20e904b8381e7bff652296abfb60ffa3858d43dd791c40db5ef100f38cbd9129604bf5168cdc6cb348e6390a8fb7ff9df0f682cd1c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}