{
  "manageEntity": {
    "action": "Save",
    "entityId": "917874798",
    "entityType": "Track",
    "nonce": "0x98fe719e21c449181b59bc20ea95551d3107fe877ac7e8a8f406f2199b6f8815",
    "signature": "0xe000f68b4b680b2efc4e8cf2ff239a6fbfbac40366fa4a9e6009430a2c2f7c0310ad3580a318e28479baa36da052bac659d12cb031cff027a42c4db85b5d36431b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}