{
  "manageEntity": {
    "action": "Save",
    "entityId": "706626051",
    "entityType": "Track",
    "nonce": "0x1a3970ea7aa981ea72d85c9da4cda25db3adb5a93fb13a27f4f68424db6e7288",
    "signature": "0x7ce74e7ece13576ab72ddf27e8a35381454d9fd6af0bfa265e8e05d5ecc575d933310aac0cb153d5e17a85d6912efb2dd9074a7b5725632f205a87d68989ddc41b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}