{
  "manageEntity": {
    "action": "Save",
    "entityId": "27225440",
    "entityType": "Track",
    "nonce": "0xe4ec4056ebdc32c3fde81988a3590465c671043e1caf378d7ba59aaf17e07ea5",
    "signature": "0x49f41ac93dceac3213367e8ae451311101037525fa3aacdbf6bcab1a3286762e39eb20dad8a59a5981da0c1a386a1874c3dcf3b7f656b00a0cf704f3d98f726f1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}