{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441830895",
    "entityType": "Track",
    "nonce": "0x22dbb80460f6e213e4350ae9e38bac10303e867695a280d17680bb46c42bd18f",
    "signature": "0x4ddaf4852a6a99338a32f6ea42bc38e4b41594797214dd7b1f0d7a6e5ffb457c37a4a40f0b597a0c07b22aa4d7de54650646598122a0750f2f6867f50bd1e01a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}