{
  "manageEntity": {
    "action": "Save",
    "entityId": "785574985",
    "entityType": "Track",
    "nonce": "0xa177e3ae2b4f8d66aaee008ea56e485a494b924d3e02d513744547a66a286fbd",
    "signature": "0x3ac84ab36a653a36fa4b69a3edd975dc8c74a06acd91e90f638aec3db249baad6d8546d2a407a3f57cdb391f6b7c242bef6bbfcd9a09f0e69de93b9f5ca6733f1c",
    "signer": "0x8f0A5939761dE5f6b984a401d42E21b5B3023674",
    "userId": "925049268"
  }
}