{
  "manageEntity": {
    "action": "Save",
    "entityId": "1278096594",
    "entityType": "Track",
    "nonce": "0x8a00fb92cc517b80993a5c626437e55946866f356823e59749c5e9216ac372ac",
    "signature": "0xff4794d3b3b4374abc4f720288376c6ff24224d42f3f52653bda78ef0d0bab9f6ee395131b794be63bbf76a6117bf77fabbedc0037865f378b91f1ff2c073aa91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}