{
  "manageEntity": {
    "action": "Save",
    "entityId": "1681340898",
    "entityType": "Track",
    "nonce": "0x9c972a9d4e4ff5c29c916faa65b1931b3a255dc1c89679a58a8469517efc4461",
    "signature": "0xe61b472b153a61501a1192dfba82612cd93b50fd1e286ed3eac1370a160939f23b4798b3956cab9a5eb8e30ab4d68ab56d0a94f38f300fb23f577f7150a79dde1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}