{
  "manageEntity": {
    "action": "Save",
    "entityId": "552235736",
    "entityType": "Track",
    "nonce": "0xf1e1236b54174e9f7811461257574ddad323e70dc14b009e1f59549ce86fb18e",
    "signature": "0x28e99a6b2bfe134f3e22445a1739c3cf92408a526cd5a45cac8133ad5ebc8d9347bd61db0c5a1e0aed0c469ed850da0fbb8e0e2b0183df8ec9047edf5d5e92ad1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}