{
  "manageEntity": {
    "action": "Save",
    "entityId": "1791801235",
    "entityType": "Track",
    "nonce": "0x8762dd6d27fefb8a8f3c3aa3351c79bed7ddf228234ce08aa001a022a16b502b",
    "signature": "0x02188068ade02be3ebda8e52480421acb7ce336d2dc3608f915eb533a37e8204594aa5603fa8a791438d3dd9e8a2263a0d1e04b79663d6fe7673354979ddb3161c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}