{
  "manageEntity": {
    "action": "Save",
    "entityId": "2017872417",
    "entityType": "Track",
    "nonce": "0xbef5c7b247b57cc15f69e143f439239bc5f2d41484b8ad7ee3d7b3caf167712a",
    "signature": "0x3b0a3b65b4512ea95b217c5dd06f9eefaaac928e401d3f4e5e5282211b3d08ff676b3b3b158c865a8baaac236fd2c47fefacf98bceff204b3bc05072ab7dab221c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}